### Video Transcript

The diagram shows three cells
connected in parallel. What is the total emf provided by
the cells?

Looking at the diagram, we see that
each of the cells has the same emf, specifically four volts. We next notice that moving from
left to right, all of the cells have their negative terminal on the left and their
positive terminal on the right. So all of the cells have the same
orientation along the path of current. We now recall that when all of the
cells in a parallel combination have the same emf and the same orientation, the
total emf is the same as the emf of one of the individual cells. Since each of these cells has an
emf of four volts, the total emf of this parallel combination is also four
volts.